Three people picked 65 apples altogether.
At the first tree they each picked the same number of apples. At the second
tree they each picked 3 times as many as they picked at the first tree.
When they finished at the third tree, the group had 5 times as many
apples as they had when they started at that tree. At the fourth tree the
group picked just 5 apples. How many apples did each person pick at the
first tree?